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Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
from 17 July 2017 to 18 July 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Version / remarks:
2016
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Version / remarks:
2006
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7950 (Vapor Pressure)
Version / remarks:
1996
Deviations:
no
GLP compliance:
yes
Type of method:
effusion method: isothermal thermogravimetry
Specific details on test material used for the study:
Reaction/decomposition starts during melting (at ca. 288°C).
Key result
Temp.:
25 °C
Vapour pressure:
0 Pa
Key result
Temp.:
20 °C
Vapour pressure:
0 Pa

Table: Results of the isothermal TGA analysis (test item)

 

Temperature
[°C]

Weight loss
[µg/min]

vT
[g/cm2/h]

log vT

log PT

PT
[Pa]

210

1.06868

1.28E-04

-3.89

0.08

1.2

 

1.01359

1.21E-04

-3.92

0.05

1.1

220

1.31529

1.57E-04

-3.80

0.19

1.6

 

1.31469

1.57E-04

-3.80

0.19

1.6

230

1.65561

1.98E-04

-3.70

0.32

2.1

 

1.67544

2.00E-04

-3.70

0.32

2.1

    

Conclusions:
The vapour pressure of the substance at 20°C was determined to be 7.5E-05 Pa.
The vapour pressure of the substance at 25°C was determined to be 1.1E-04 Pa.
Executive summary:

The vapour pressure of the substance was determined using the isothermal thermogravimetric effusion method in a GLP study according to EC A.4, OECD 104 and OPPTS 830.7950. The vapour pressure regression curve was constructed from duplicate measurements at 210°C, 220°C and 230°C. The vapour pressure of the substance at 20°C and 25°C was calculated to be 7.5E-05 Pa and 1.1E-04 Pa, resp.

Description of key information

1.1E-04 Pa at 25°C (EC A.4, OECD 104, OPPTS 830.7950: isothermal thermogravimetric effusion method)

Key value for chemical safety assessment

Vapour pressure:
0 Pa
at the temperature of:
25 °C

Additional information

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